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Performance of a Novel In-Situ Converted Additive for High Voltage Li-ion Pouch Cells
Journal of the Electrochemical Society
In search for new classes of additives for high voltage NMC/graphite lithium-ion cells, the precursor additive bis(trimethylsilyl) malonate (bTMSM) is shown to be activated via a spontaneous reaction with LiPF6 and LiBF4 salts in carbonate-based electrolyte to form lithium tetrafluoro(malonato)phosphate (LiTFMP), and lithium difluoro(malonato)borate (LiDFMB), respectively. The reaction schemes and rates were studied via NMR spectroscopy and GCMS. The effects of LiTFMP and LiDFMB on high voltagedoi:10.1149/1945-7111/ac9c36 fatcat:wga34sggyfdmjcomwtx644thsu